@misc{indiciaefc7bf34aa597,
  title = {Geologic map of Proterozoic rocks near Mountain, Oconto County, Wisconsin},
  author = {P.K. Sims},
  year = {1989},
  doi = {10.3133/i1903},
  url = {https://pubs.usgs.gov/publication/i1903},
  note = {Source identifier: i1903}
}